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Due to the lapse in government funding, the information on this web site may not be up to date, transactions submitted via the web site may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. Updates regarding government operating status and resumption of normal operations can be found at


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A to Z Index of Resources

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Self-paced tutorial covering key principles of toxicology

For Information About...

Especially for Students and Educators

Educational materials on toxicology, chemistry, and environmental health

Learn to Use TOXNET

TOXNET training manual and schedule of TOXNET training classes.

Training Videos

Short video introductions to HSDB, LactMed, and TOXMAP